AMD Infinity Storage (AIS)

AMD Infinity Storage (AIS)#

When the AMD GPU driver initializes AIS (AMD Infinity Storage), it registers the GPU’s VRAM with the P2PDMA kernel subsystem. This generates about 1GB of metadata for every 64GB of VRAM. This metadata is stored in the host’s DRAM.

AIS is enabled by default. If you don’t need AIS, you can reclaim this memory by disabling AIS from being initialized by the GPU driver.

Disable AIS#

To disable AIS until next reboot:

sudo modprobe -r amdgpu
sudo modprobe amdgpu ais_disabled=1

To disable AIS persistently across reboots:

sudo bash -c 'echo "options amdgpu ais_disabled=1" > /etc/modprobe.d/amdgpu-ais.conf'
sudo update-initramfs -c -k all
sudo systemctl reboot

Enable AIS#

To enable AIS until next reboot:

sudo modprobe -r amdgpu
sudo modprobe amdgpu ais_disabled=0

To enable AIS persistently across reboots:

sudo rm /etc/modprobe.d/amdgpu-ais.conf
sudo update-initramfs -c -k all
sudo systemctl reboot
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